in times of high flow. The Environment Agency and the Yorkshire Wildlife Trust, have undertaken work along the course of the river to remediate the issues. Geology The River Wiske is underlain by a range of geological deposits, including undifferentiated sandstone, conglomerate, undifferentiated mudstone, siltstone and sandstone from the Triassic period, and the Lias group consisting of mudstone, siltstone, limestone and sandstone from the Mesozoic period. Natural history There are four non-statutory Nature Conservation Sites along the river: Middlebrough plantation just outside Newby Wiske; Stony Lane Pond near the confluence of Stony Lane Beck and Carr Beck; Pepper Arden Bottoms near East Cowton and Pheasantry Wood and Fox Covert near Danby Wiske. The river passes through farmland bounded by hedgerows with some wet woodland near Kirby Wiske and some grassland near Newby Wiske. Biodiversity audits carried out in 2010 found European water vole on the river between Danby Wiske and Brompton Beck. European otters were found on the river between North Otterington and Kirby Wiske. Soprano pipistrelle and brown long-eared bat were also found in the area along with kingfisher, reed bunting and lapwing. Lists Tributaries East Rounton Stell Welbury Stell Carr Bridge Stell The Stell Willow Beck Howe Beck Spudling Dike Sike Stell Settlements Ingleby Arncliffe East Rounton West Rounton Appleton Wiske Great Smeaton Birkby Hutton Bonville Danby Wiske Yafforth Northallerton Warlaby North Otterington Newby Wiske South Otterington Kirby Wiske Crossings Baulk Bridge, Ingleby Arncliffe East Rounton Bridge, East Rounton West Rounton Bridge, West Rounton Wiske Railway Bridge, Middlesbrough branchline Wiske Bridge, Appleton Wiske Unnamed road near Hornby Grange Farm Smeaton Bridge, A167 Unnamed road near Frigdale Wiske Bridge, Birkby Railway Bridge, East Coast Main Line Wiske Bridge, Danby Wiske Yafforth Bridge, B6271 Wensleydale Railway Bridge Viewly Bridge, Ainderby Road, A684 Howden Bridge, nr Romanby Unnamed road nr North Otterington Otterington Bridge, between Newby Wiske and South Otterington Kirby Bridge, Kirby Wiske Pivet Bridge (foot), nr Kirby Wiske Gallery References Rivers of North Yorkshire